cpython/Misc/NEWS.d/3.11.0rc2.rst

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.. date: 2022-08-07-16-53-38
.. gh-issue: 95778
.. nonce: ch010gps
.. release date: 2022-09-11
.. section: Security
Converting between :class:`int` and :class:`str` in bases other than 2
(binary), 4, 8 (octal), 16 (hexadecimal), or 32 such as base 10 (decimal)
now raises a :exc:`ValueError` if the number of digits in string form is
above a limit to avoid potential denial of service attacks due to the
algorithmic complexity. This is a mitigation for `CVE-2020-10735
<https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-10735>`_.
This new limit can be configured or disabled by environment variable,
command line flag, or :mod:`sys` APIs. See the :ref:`integer string
conversion length limitation <int_max_str_digits>` documentation. The
default limit is 4300 digits in string form.
Patch by Gregory P. Smith [Google] and Christian Heimes [Red Hat] with
feedback from Victor Stinner, Thomas Wouters, Steve Dower, Ned Deily, and
Mark Dickinson.
..
.. date: 2022-09-09-13-13-27
.. gh-issue: 96678
.. nonce: vMxi9F
.. section: Core and Builtins
Fix case of undefined behavior in ceval.c
..
.. date: 2022-09-07-13-38-37
.. gh-issue: 96641
.. nonce: wky0Fc
.. section: Core and Builtins
Do not expose ``KeyWrapper`` in :mod:`_functools`.
..
.. date: 2022-09-07-12-02-11
.. gh-issue: 96636
.. nonce: YvN-K6
.. section: Core and Builtins
Ensure that tracing, ``sys.setrace()``, is turned on immediately. In
pre-release versions of 3.11, some tracing events might have been lost when
turning on tracing in a ``__del__`` method or interrupt.
..
.. date: 2022-09-06-16-54-49
.. gh-issue: 96572
.. nonce: 8DRsaW
.. section: Core and Builtins
Fix use after free in trace refs build mode. Patch by Kumar Aditya.
..
.. date: 2022-09-06-16-22-13
.. gh-issue: 96611
.. nonce: 14wIX8
.. section: Core and Builtins
When loading a file with invalid UTF-8 inside a multi-line string, a correct
SyntaxError is emitted.
..
.. date: 2022-09-06-14-26-36
.. gh-issue: 96612
.. nonce: P4ZbeY
.. section: Core and Builtins
Make sure that incomplete frames do not show up in tracemalloc traces.
..
.. date: 2022-09-05-16-43-44
.. gh-issue: 96569
.. nonce: 9lmTCC
.. section: Core and Builtins
Remove two cases of undefined behavior, by adding NULL checks.
..
.. date: 2022-09-05-15-07-25
.. gh-issue: 96582
.. nonce: HEsL5s
.. section: Core and Builtins
Fix possible ``NULL`` pointer dereference in ``_PyThread_CurrentFrames``.
Patch by Kumar Aditya.
..
.. date: 2022-08-28-10-51-19
.. gh-issue: 96352
.. nonce: jTLD2d
.. section: Core and Builtins
Fix :exc:`AttributeError` missing ``name`` and ``obj`` attributes in
:meth:`object.__getattribute__`. Patch by Philip Georgi.
..
.. date: 2022-08-25-10-19-34
.. gh-issue: 96268
.. nonce: AbYrLB
.. section: Core and Builtins
Loading a file with invalid UTF-8 will now report the broken character at
the correct location.
..
.. date: 2022-08-22-21-33-28
.. gh-issue: 96187
.. nonce: W_6SRG
.. section: Core and Builtins
Fixed a bug that caused ``_PyCode_GetExtra`` to return garbage for negative
indexes. Patch by Pablo Galindo
..
.. date: 2022-08-19-06-51-17
.. gh-issue: 96071
.. nonce: mVgPAo
.. section: Core and Builtins
Fix a deadlock in :c:func:`PyGILState_Ensure` when allocating new thread
state. Patch by Kumar Aditya.
..
.. date: 2022-08-18-13-47-59
.. gh-issue: 96046
.. nonce: 5Hqbka
.. section: Core and Builtins
:c:func:`PyType_Ready` now initializes ``ht_cached_keys`` and performs
additional checks to ensure that type objects are properly configured. This
avoids crashes in 3rd party packages that don't use regular API to create
new types.
..
.. date: 2022-08-11-11-01-56
.. gh-issue: 95818
.. nonce: iClLdl
.. section: Core and Builtins
Skip over incomplete frames in :c:func:`PyThreadState_GetFrame`.
..
.. date: 2022-08-11-09-19-55
.. gh-issue: 95876
.. nonce: YpQfoV
.. section: Core and Builtins
Fix format string in ``_PyPegen_raise_error_known_location`` that can lead
to memory corruption on some 64bit systems. The function was building a
tuple with ``i`` (int) instead of ``n`` (Py_ssize_t) for Py_ssize_t
arguments.
..
.. date: 2022-08-04-18-46-54
.. gh-issue: 95605
.. nonce: FbpCoG
.. section: Core and Builtins
Fix misleading contents of error message when converting an all-whitespace
string to :class:`float`.
..
.. date: 2022-07-19-04-34-56
.. gh-issue: 94996
.. nonce: dV564A
.. section: Core and Builtins
:func:`ast.parse` will no longer parse function definitions with
positional-only params when passed ``feature_version`` less than ``(3, 8)``.
Patch by Shantanu Jain.
..
.. date: 2022-09-08-23-23-24
.. gh-issue: 96700
.. nonce: J0MQGK
.. section: Library
Fix incorrect error message in the :mod:`io` module.
..
.. date: 2022-09-07-22-49-37
.. gh-issue: 96652
.. nonce: YqOKxI
.. section: Library
Fix the faulthandler implementation of ``faulthandler.register(signal,
chain=True)`` if the ``sigaction()`` function is not available: don't call
the previous signal handler if it's NULL. Patch by Victor Stinner.
..
.. date: 2022-09-04-12-32-52
.. gh-issue: 68163
.. nonce: h6TJCc
.. section: Library
Correct conversion of :class:`numbers.Rational`'s to :class:`float`.
..
.. date: 2022-08-29-15-28-39
.. gh-issue: 96385
.. nonce: uLRTsf
.. section: Library
Fix ``TypeVarTuple.__typing_prepare_subst__``. ``TypeError`` was not raised
when using more than one ``TypeVarTuple``, like ``[*T, *V]`` in type alias
substitutions.
..
.. date: 2022-08-27-14-38-49
.. gh-issue: 90467
.. nonce: VOOB0p
.. section: Library
Fix :class:`asyncio.streams.StreamReaderProtocol` to keep a strong reference
to the created task, so that it's not garbage collected
..
.. date: 2022-08-22-18-42-17
.. gh-issue: 96159
.. nonce: 3bFU39
.. section: Library
Fix a performance regression in logging TimedRotatingFileHandler. Only check
for special files when the rollover time has passed.
..
.. date: 2022-08-22-13-54-20
.. gh-issue: 96175
.. nonce: bH7zGU
.. section: Library
Fix unused ``localName`` parameter in the ``Attr`` class in
:mod:`xml.dom.minidom`.
..
.. date: 2022-08-19-18-21-01
.. gh-issue: 96125
.. nonce: ODcF1Y
.. section: Library
Fix incorrect condition that causes ``sys.thread_info.name`` to be wrong on
pthread platforms.
..
.. date: 2022-08-18-14-53-53
.. gh-issue: 95463
.. nonce: GpP05c
.. section: Library
Remove an incompatible change from :issue:`28080` that caused a regression
that ignored the utf8 in ``ZipInfo.flag_bits``. Patch by Pablo Galindo.
..
.. date: 2022-08-11-18-52-17
.. gh-issue: 95899
.. nonce: _Bi4uG
.. section: Library
Fix :class:`asyncio.Runner` to call :func:`asyncio.set_event_loop` only once
to avoid calling :meth:`~asyncio.AbstractChildWatcher.attach_loop` multiple
times on child watchers. Patch by Kumar Aditya.
..
.. date: 2022-08-11-18-22-29
.. gh-issue: 95736
.. nonce: LzRZXe
.. section: Library
Fix :class:`unittest.IsolatedAsyncioTestCase` to set event loop before
calling setup functions. Patch by Kumar Aditya.
..
.. date: 2022-08-08-01-42-11
.. gh-issue: 95704
.. nonce: MOPFfX
.. section: Library
When a task catches :exc:`asyncio.CancelledError` and raises some other
error, the other error should generally not silently be suppressed.
..
.. date: 2022-07-25-15-45-06
.. gh-issue: 95231
.. nonce: i807-g
.. section: Library
Fail gracefully if :data:`~errno.EPERM` or :data:`~errno.ENOSYS` is raised
when loading :mod:`crypt` methods. This may happen when trying to load
``MD5`` on a Linux kernel with :abbr:`FIPS (Federal Information Processing
Standard)` enabled.
..
.. date: 2022-07-09-08-55-04
.. gh-issue: 74116
.. nonce: 0XwYC1
.. section: Library
Allow :meth:`asyncio.StreamWriter.drain` to be awaited concurrently by
multiple tasks. Patch by Kumar Aditya.
..
.. date: 2022-05-19-22-34-42
.. gh-issue: 92986
.. nonce: e6uKxj
.. section: Library
Fix :func:`ast.unparse` when ``ImportFrom.level`` is None
..
.. date: 2022-08-19-17-07-45
.. gh-issue: 96098
.. nonce: nDp43u
.. section: Documentation
Improve discoverability of the higher level concurrent.futures module by
providing clearer links from the lower level threading and multiprocessing
modules.
..
.. date: 2022-08-13-20-34-51
.. gh-issue: 95957
.. nonce: W9ZZAx
.. section: Documentation
What's New 3.11 now has instructions for how to provide compiler and linker
flags for Tcl/Tk and OpenSSL on RHEL 7 and CentOS 7.
..
.. date: 2022-08-22-14-59-42
.. gh-issue: 95243
.. nonce: DeD66V
.. section: Tests
Mitigate the inherent race condition from using find_unused_port() in
testSockName() by trying to find an unused port a few times before failing.
Patch by Ross Burton.
..
.. date: 2022-07-08-10-28-23
.. gh-issue: 94682
.. nonce: ZtGt_0
.. section: Build
Build and test with OpenSSL 1.1.1q
..
.. date: 2022-09-07-00-11-33
.. gh-issue: 96577
.. nonce: kV4K_1
.. section: Windows
Fixes a potential buffer overrun in :mod:`msilib`.
..
.. date: 2022-09-05-18-32-47
.. gh-issue: 96559
.. nonce: 561sUd
.. section: Windows
Fixes the Windows launcher not using the compatible interpretation of
default tags found in configuration files when no tag was passed to the
command.